The Rydberg formula, published in 1888, provides the mathematical foundation for describing the wavelengths of photons emitted by changes in the energy level of an electron. Devising this equation remains the primary scientific achievement of Johannes Rydberg, a Swedish physicist who spent his entire academic career at Lund University investigating the patterns inherent in atomic spectra.
Academic Foundation and Early Career
Born in Halmstad in 1854, Rydberg attended Halmstads elementärläroverk before enrolling at Lund University in 1873. He completed a bachelor's degree two years later and earned a Doctor of Philosophy in 1879, with a dissertation titled Konstruktioner af kägelsnitt i 3- och 4-punktskontakt. Upon graduation, he served as an amanuensis at the institution, achieving the status of docent in mathematics in 1880 and docent in physics in 1882.
Twenty questions, eight minutes on the clock, and a percentile measured against everyone who has taken it. No sign-up.
Take the IQ test →Atomic Research and Spectroscopy
Rydberg dedicated significant effort to examining the standard atomic weight, seeking to understand the periodic system established by Mendeleev. This led to his extensive investigations into atomic spectra. While Johann Jakob Balmer had previously presented an empirical formula for hydrogen in 1885, Rydberg’s 1888 publication offered a broader formula applicable to various elements. His work on spectral lines anticipated the theoretical breakthroughs later developed by Niels Bohr in 1913.
Professional Tenure and Later Life
Despite his contributions to physics, Rydberg faced challenges in his career advancement, being rejected for a full professorship in 1897. He served as an extraordinary professor until 1909, when he was finally upgraded to a full professorship. To supplement his income, he worked as a numerical examiner at Sparbanken in Lund starting in 1891 and as an actuary in Malmö from 1905. His research slowed in 1913 due to illness, and he was granted leave in 1915.
Legacy and Death
Rydberg died on 28 December 1919 at Lund Hospital and was buried at the northern cemetery in Lund. He was succeeded at the university by his student, Manne Siegbahn. In the same year as his death, he was recognized as a Foreign Member of the Royal Society. His name is permanently associated with the Rydberg constant, the Rydberg unit, Rydberg atoms, Rydberg matter, Rydberg molecules, and the Rydberg-Ritz combination principle.
Fast facts
- Born: 1854, Halmstad, Sweden
- Died: 1919, Lund, Sweden
- Education: Lund University (1873-1879)
- Primary Employer: Lund University (1880-1915)
- Notable Achievement: Published the Rydberg formula in 1888
- Honours: Foreign Member of the Royal Society (1919)
Questions readers ask
What is the Rydberg formula?
It is an equation published in 1888 used to calculate the wavelengths of photons emitted by an electron changing energy levels in an atom.
Where is Johannes Rydberg buried?
He is buried at the northern cemetery in Lund, Sweden.
Achievements
- Affiliated with Lund University
- Educated at Lund University
- Worked as physicist, university teacher and mathematician
